package com.atguigu.lease.web.admin.custom.interceptor;

import com.atguigu.lease.common.context.LoginUser;
import com.atguigu.lease.common.context.LoginUserContext;
import com.atguigu.lease.common.ecception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

@Component
public class AuthenticationInterceptor implements HandlerInterceptor {
    //拦截指定发送到控制器方法的请求信息
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
       //获取请求头中的token
        String token = request.getHeader("access_token");
        if (token==null){//没token
            throw  new LeaseException(ResultCodeEnum.ADMIN_LOGIN_AUTH);
        }
        else {
            //验证token是否过期
            Claims claims = JwtUtil.parseToken(token);
            Long userid = claims.get("userid", Long.class);
            String username = claims.get("username", String.class);

            //本地线程保存数据
            LoginUserContext.setLoginUser(new LoginUser(userid,username));

        }
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        LoginUserContext.removeLoginUser();
    }
}
